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Electrical and Magnetic Properties of BiFeO₃ Multiferroic Ceramics
M. Roy,Sumit Jangid,Shiv Kumar Barbar,Praniti Dave 한국자기학회 2009 Journal of Magnetics Vol.14 No.2
The multiferroic BiFeO₃ has been investigated extensively in both thin film and ceramic form. However, the synthesis of a perfect sample with high resistivity is a prerequisite for examining its properties. This paper reports the synthesis of multiferroic BiFeO₃ along with its structural, electrical and magnetic properties in ceramic form. Polycrystalline ceramic samples of BiFeO₃ were synthesized by solid-state reaction using high purity oxides and carbonates. The formation of a single-phase compound was confirmed by x-ray diffraction and its lattice parameters were determined using a standard computer program. The microstructural studies and density measurement confirmed that the prepared samples were sufficiently dense for an examination of its electrical and magnetic properties. The dc electrical conductivity studies show that the sample was resistive with an activation energy of ~0.81 eV. The magnetization measurement showed a linear (M~H) curve indicating antiferromagnetic characteristics.